Automatic damper for heating and ventilating systems.



UNITED STATES PATENT OEE-ICE.

CHARLES W. ROGERS, OF CHICAGO, ILLINOIS, ASSIGNOR OFA ONE-HALF TO JULIEN W. MATHIS AND AUGUST MATHIS, OF SAME PLACE.

AUTOMATIC DAMPER FOR HEATING AND VENTILATING SYSTEMS.

SPECIFICATION forming' part of Letters Patent No. 631,753, dated August 22, 1899.

Application filed March 16 1899.

To a/ZZ whom it may concern.-

Be it known that I, CHARLES W. ROGERS, a citizen Vof the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Automatic Dampers for IIeating and Ventilating Systems; and I do hereby declare the following to be a full, clear, and exact description of the same, reference 1o being had to the accompanying drawings,

forming a part of this specification.

The present invention relates to automatically-operating reversible dampers for use in connection with the heating and ventilating apparatus of factory forge-rooms and the like, in which during different seasons or periods it is intended that the fan or blower shall be run at one time in exhaust to remove the smoke and gases from the differ- 2o ent forge-fires and at another time to run in pressure or blast to introduce heated air from any suitable source into the forge-room at points adjacent to the various forges in the room; and the present improvement has for its objects to provide a simple and efficient damper mechanism for use in connection with the Ventilating and heatin g ducts of a factoryforge, to automatically connect such ducts with the hoods of the different forges, to re- 3o move the smoke and products of combustion therefrom when the fan or blower of the system is running in exhaust, and which damper mechanism is adapted to automatically reverse and shut off connection with such 3 5 forge-hoods when the fan or blower is reversed by hand to run in pressure or blast, and to discharge heated air from any suitable source into the various parts of the forge-room in proximity to the dierent forges, all as will 4o hereinafter more fully appear and be more particularly pointed out in the claims. I attain such objects by the construction and arrangement of parts illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of a reversible damper constructed in accordance with the present invention, the parts being shown in the position occupied when a pressure-blast is passing through the damper-casing. Fig.

5o 2 is a similar view showing thc parts in the Serial No. 709,354. (No model.)

position occupied when an exhaust-draft is passing through the .damper-casing.

Similar numerals of reference indicate like parts in both views.

Referring to the drawings, l represents the main body of the damper-casing, preferably rectangular in cross-section and provided with upper and lower attaching-necks 2 and 3, as shown, the upper one of which is adapted for connection to a branch duct of the ordi- 6o nary heating and Ventilating system for factory-forges, while the lower end of such casing is adapted for connection to the apex of the hood of the individual forge to which the branch duct aforesaid extends.

5 and 6 are exits or discharge-openings in the opposite walls of the damper-casing 1, provided With hinge doors or dampers 7 and 8, the damper 7 being hinged at its lower end and closing against gravity, while the damper 8 7o is hinged at its top to close by gravity.

9`is a diagonal diaphragm within the damper-casing 1, provided with an opening l0, through which communication is had between the vupper and lower portions of the dampercasing.

l1 is a hinge damper or shutter controlling the opening 10 of diagonal diaphragm 9 and adapted when closed to shut off communication between the upper and lower portion of 8o the damper-casing and when open to allow free communication between the two. This damper 11 is preferably hinged near its lower end, so as to tend to assume a closed condition by gravity.

l2 is a link connecting the dampers 7 and 11 together, so that they will operate in unison, the one being closed while the other is open, and vice versa.

In some cases the diaphragm 9 may be dis 9o pensed with and dependence placed upon the damper 11 finding its seat upon the opposite walls of the damper-casing 1.

The operation ,of the present automatic damper in connection with a heating and ventilating system, as heretofore described, is as follows: With a pressure or blast within the ducts of the system the dampers of the present invention will automatically assume the positions illustrated in Fig. 1 of the drawings, roo

with the damper 7 open to allow the products.

ofcombustion from the forge to escape into the forge-room, the damper ll closed to cut oiii thebranch duct of the system from communication with the hood of the forge, and the damper 8 open to permit the escape of heated air from such branch duct into the forge-room. With a reversal of the operat. ing-fan of the system to cause an exhaust or suction within the yducts of the system the. dampers aforesaid will automatically assumethe positions illustrated in Fig. 2 ofthe drawings, with the damper 7 closed to preventthey escape into the room of the products ofl combustion from the forge, the damper ll open to admit of communication between the hood of the forge and the branch duct of the system, and the damper 8 closed to prevent ingress of air from theforge-room into said branch duct.

Having thus fully described my said invention, what I claim as new, and desire tosecure by Letters "Patent, is-

l. In a Ventilating and heating system for factory forge-rooms and the like,an automatically-operatin g reversible damper, comprising in combination la damper-casing having openings in its opposite Walls, outwardly-opening dampers controlling said openings, and a pivoted damperarrangedwithin said casing and adapted to control communication between the upper and lower portions of said casing, and means operated by said pivoted damper for controlling one of the outwardly-opening dampers-whereby when said pivoted damper is open the outwardly-opening damper is closed and vice versa, substantially as set forth.

2. .In a ventilatingandheating system for factory forge-rooms and the like,an automatically-operating reversible damper, comprising in combination adam percasing having openings in its oppositewa'lls, hinged darn pers controlling said openings, a pivoted damper arranged Within said casing and adapted to control communieation between the upper and` lower portions .of suehcas-ing, and a link connection between such pivoted dam-perland one of the dampers controlling-.an opening inthe -wall of the casing, .substantiallyas setforth. In testimony whereof :Witness my hand this Qt-h'day of March, 1899.

C. W'. ROGERS. In presence of ROBERT BURNS, J. F. SPRAGUE. 

